linux-kernel - Re: [PATCH v3 0/6] PCI: J7200/J721E PCIe bindings

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Message-ID: <465097c1-2d38-ad45-cc32-d92c385114c5@ti.com>
Date:   Mon, 4 Jan 2021 18:40:06 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Nishanth Menon <nm@...com>
CC:     Rob Herring <robh+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 0/6] PCI: J7200/J721E PCIe bindings

Nishanth,

On 04/01/21 6:29 pm, Nishanth Menon wrote:
> On 17:52-20210104, Kishon Vijay Abraham I wrote:
>> Patch series adds DT nodes in order to get PCIe working in J7200.
>> Also includes couple of fixes for J721e.
>>
>> v1 of the patch series can be found @ [1]
>> v2 of the patch series can be found @ [2]
>>
>> Changes from v2:
>> 1) Moved serdes_refclk node out of interconnect node and also replaced
>>    "_" with "-"
>>
>> Changes from v1:
>> 1) Include only the device tree patches here (the binding patch is sent
>> separately)
>> 2) Include couple of patches that fixes J721E DTS.
>>
>> [1] -> http://lore.kernel.org/r/20201102101154.13598-1-kishon@ti.com
>> [2] -> http://lore.kernel.org/r/20201210130747.25436-1-kishon@ti.com
>>
>> Kishon Vijay Abraham I (6):
>>   arm64: dts: ti: k3-j721e-main: Fix supported max outbound regions
>>   arm64: dts: ti: k3-j721e-main: Remove "syscon" nodes added for
>>     pcieX_ctrl
>>   arm64: dts: ti: k3-j7200-main: Add SERDES and WIZ device tree node
>>   arm64: dts: ti: k3-j7200-main: Add PCIe device tree node
>>   arm64: dts: ti: k3-j7200-common-proc-board: Enable SERDES0
>>   arm64: dts: ti: k3-j7200-common-proc-board: Enable PCIe
>>
>>  .../dts/ti/k3-j7200-common-proc-board.dts     |  38 ++++++
>>  arch/arm64/boot/dts/ti/k3-j7200-main.dtsi     | 111 ++++++++++++++++++
>>  arch/arm64/boot/dts/ti/k3-j721e-main.dtsi     |  52 ++------
>>  3 files changed, 157 insertions(+), 44 deletions(-)
> 
> 
> A bit confused on the dependency here. is there something merged into
> next-20210104 that makes this series ready for pickup? is there a way
> I can get a immutable tag for driver fixups to pull so that my dts
> next is not broken for PCIe (I am assuming looking at the series that
> this is probably not a backward compatible series?)?

There are no driver changes for the basic J7200 PCIe support and the DT
bindings are already merged [1].

There are few errata fixes applicable for J721E which has to be removed
for J7200 but that depends on other patches to be merged [1] but that
doesn't impact j7200 functionality.

[1] ->
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/pci/ti,j721e-pci-host.yaml#n19
[2] -> http://lore.kernel.org/r/20201230120515.2348-1-nadeem@cadence.com

Thanks
Kishon